Checker assembly for stove construction



Jan. 3, 1950 E. H. KOENIG 2,493,458

CHECKER ASSEMBLY FOR STOVE CONSTRUCTION Filed April 30, 1945 2 Sheets-Sheet 1 ILIHHHIHHI INVENTOR. Ernest H. Koen. 1'.

' Jan. 3, 1950 E. H. KOENIG CHECKER ASSEMBLY FOR STOVE CONSTRUCTION Filed April 30, 1945 2 Sheets-Sheet 2 I INVENTOR. Ernest! H.Koeni g- BY WWW-7', \c/

Frrfl rm .1... s, rose CHECKED ASSEMBLY FOR STOVE CONSTRUCTION lrnestlloenig,cblsago,m,assignortolreyn Co pany.

rationorMaine Chicago, 111., a orpo- Application April a, 1045, Serial No. 590.9112

1 Claim. (01. 72-102) The present invention relates to improvements.

in checker assembly for stove construction.

More particularly the present invention relates to improvements analogous to thou disclosed and claimed in the application of Bruce E. Tau, Serial No. 535,271, filed May 12, 1944, for Stove construction.

In certain of its aspects the present invention may be said to cover a modification of the disclosure of said Tau application.

It is common practice to build a hot blast stove with an annular ring wall and to provide the interior of the stove with an assembly of checkers, which checkers provide a plurality of eways for products of combustion for supplying heat to said checkers, which eways in turn permit the fiow of air to be heated by said checkers.

The checkers used in hot blast stoves are sub- Jected to very high temperatures and should be supported in a substantial manner by the ring wall. Moreover, the checkers must be replaced at times, and it is important that the matter of replacement be made as simple as possible.

In certain arrangements of checkers the outer surface of the checker body is characterized by a very irregular serrated contour. It is difiicult to build a satisfactory ring wall to Join this contour satisfactorily. According to certain prior constructions the ring wall has been made up of a combination of key bricks and straight bricks laid radially in make a ring wall having a substantially smooth exterior contour and a substantially smooth interior contour. The space between the smooth interior contour and the irresular serrated contour of the checker body has been filled with irregularly shaped pieces of brick or the like and with clay. The construction just described has the disadvantage that the ring wall does not serve as a substantial support for the checker body, inasmuch as the intermediate filling between the interior surface of the ring wall and the exterior surface of the checker body is not strong. This type of construction lacks stability. This type of construction has the further disadvantage that if and when the checker body or portions thereof are removed for replacement. the filling material between the interior contour of the ring wall and the outer surface of the checker body falls oil, inasmuch as it is not bonded to the ring wall and has very little inherent stability.

According to another prior construction, the

ring wall is made up entirely of standard straight as bricks. Considerable difiiculty has been experiencedinfittingthesebrickstotheirregularcon tour of the exterior oi the checker body to provide the relatively intimate fit which is desired in order that the ring wall will serve to support the checker body for providing stability. In order to accomplish such fit it was necessary to cut a large number of bricks, usually by sawing. This involved a relatively great time for construction and relatively high construction cost. In some cases it was sought to obviate this high cost by omitting the relatively intimate fit between the ring wall and the exterior of the checker body and instead. filling the space between the ring wall and the checker body in the manner generally described in previous paragraphs. This construction had the disadvantage above mentioned.

An object of the present invention is to provide a stove construction in which the interior of the ring wall and the exterior of the checker body engage along chords bounding the periphery of the checker body, the construction being such as to provide a maximum heat exchange area per umt of mass.

A further object is to provide an improved stove construction in which the periphery of the checker body is provided by a relatively small number of specially constructed checkers for providing a checker body having its exterior surface arranged along fiat surfaces, the construction being such as to provide a relatively large heat exchange area per unit of mass.

A further object is to provide an improved stove construction of the kind immediately above referred to having the advantage that a ring wall may be fitted thereto without the expenditure of excessive time and/or labor.

A further object is to provide an improved edge checker which is useful in building a checker body the exterior wall of which is bounded by plane surfaces, the checker having the further advantage that the heat exchange area thereof is relatively large compared to the mass thereof.

A further object is to provide a hot blast stove construction which is simple -and sturdy, which can be easily repaired, which meets the needs of commercial operation, and which provides a relatively high heat exchange area compared with its mass.

Further objects will appear as the description proceeds.

Referring to the drawings- Figure 1 is a horizontal sectional view or a portion of a blast furnace stove embodying the principles of the present invention;

Figure 2 is a top plan view of one of the standtions -20. checker i5 is the arcuate groove 2| providing communication between the holes i1, i8 and the exterior of the checker. In the claims, checkers having across sectional contour of a regular polygon will be referred to as regular checkers. An assembly of standard or regular checkers such as those indicated by the numerals I 5-4! will I produce a serrated exterior wall of the checker 1 body, and accordingly the present invention contemplates the use of supplementary checkers in cooperation with the standard or regular checkassaess I 3 ard checkers utilized in the construction illusplane indicated by the arrows l-l of Figure 4;

and

Figure 6 is a fragmentary view on an enlarged scale of part of the construction illustrated in Figure 1, Figure 6 illustrating a comer construction.

Figure 1 represents in horizontal section a blast furnace stove, said stove having the ring wall ill within which is the usual combustion chamber wall Ii providing the combustion chamber 1 l2. Said ring wall Iii is made up of bricks and has a generally cylindrical exterior, though aci cording to the present invention the exterior wall .may be more or less serrated. Surrounding the ring wall it is the shell l3, and located between the exterior of ring wall It and the shell I! is a body of insulating material indicated by the ,numeral It. This insulating material may be merely of a filler character and need have no bond with the ring wall ill or the shell l3. Accordingly, the bricks presented to the exterior oi the ring wall It may be permitted to present a rather irregular surface and the cutting of the bricks need not be exact. As will appear as the description proceeds, the interior surface of the ring wall ill will be a series of planes. Consider- ,ing the perimeter of the inner surface of the ring wall III at any elevation, said perimeter is bounded by a plurality of chords.

The numerals I5l5 in Figure 2 indicate 1 checkers of a known type, a large number of i which are assembled within the ring wall Ill toconstitute, heat storing and heat transmitting bodies I for storing up heat from products of combustion when the hot blast stove is on blast and for giving up heat to air passing through the stove when the stove is on blast.

The checkers l5i5 are of standard construction, the illustrated checker being the seven-hole type. The checker i5 chosen for illustration has a cross section in the shape of a regular hexagon, this meaning that the exterior flat surfaces i6-i6 thereof lie in an equiangular, equilateral 1 hexagon. Medially of the checker i5 is th center hole i1. Disposed in a circle about the center hole I'I are six other holes l8l8. The top side of the checker i5 is provided with a relatively shallow circular recess is communicating with the holes i1, i8, it. The flat surfaces l6l0 of the checker i5 are joined by the arcuate por- Extending transversely of the ers |5i5 to produce an exterior wall for the checker body bounded by plane surfaces.

Figure 3 illustrates one of these auxiliary checkers, said checker being indicated by the numeral 22. Said checker, it will be noted. is half of a standard checker, the standard checker ll being divided along a plane symmetrically dis-' posed with respect to the groove 2|. In other words, the checker shown in Figure s has a cross sectional contour bounded by the sides oi half of a hexagon, the dividing line being parallel with one side of said hexagon and passing through the center of said hexagon.

Another supplementary checker contemplated V imposed upon the supplementary checker 23.

Said checker 23 includes four iiat faces It equal to the corresponding fiat faces ll of the checker ll. Said checker 23 includes the broad flat face 24, the plane of which is disposed in symmetrical relationship with the flat faces ll-it.

The four flat faces is of the pentagon 23 are joined by the three arcuate surfaces 20-22. The fifth face is of the pentagon 23 is narrower than the distance between opposite faces l6--it of said pentagon or of the corresponding hexagon. In forming the face 24 the arcs 25-25 contiguous to the adjacent opposite faces il-IO are continued downwardly in directions parallel with the axis of symmetry 28 of the pentagon 22. In other words, the arcuate surfaces 25-25 have tangential surfaces 2|2l extending therefrom parallel to the axis of symmetry of the pentagon 23, which tangential surfaces terminate in the surface 24 which lies at right angles to the axis of symmetry of the pentagon 23.

It will be noted that the surface 24 is located appreciably nearer to the axis of the center hole I! than is the sixth vertex of the corresponding hexagon, all of which is clearly shown in Figure 4.

The supplementary checker .23 has the seven holes i1, is corresponding to those in the standard checker IS. The checker 23 is provided at the top thereof with the transversely extending groove 28 communicating with the center hole i1, through the recess is, with the holes lsll, and with one arcuate'suriace 20 and the opposite arcuate surface 25.

The half checkers 22 and the pentagon checkers 23, as noted above, are supplementary checkers and for convenience may be referred to as edge checkers. Said edge checkers 22 and 23 are, according to the present invention, mounted in assembled relationship with the standard checkers ii to provide the flat surfaces bounding the checker body within the ring wall l0. Considering any horizontal plane throughout the height of the checker assembly within the ring wall It, the perimeter of the plane figure denoting the cross section at that particular height is bounded by chords, the chords which bound the half checkers interspersed with regular checkers being indicated by the numerals 28-28 and the chords bounding the pentagon checkers being in dicated by the numerals 29-29.

With the outer surface of the checker body bounded by flat surfaces it is a relatively simple matter to build up the ring wall it to engage said X pentagonal checkers.

fiat surfaces. The amount of cutting of bricks in the ring wall In is minimized, and an intimate relationship is obtained between the ring wall and the checker body. This contributes to the stability of the checker body and also permits the removal of any portion of the checkers without disturbing th ring wall. Replacement checkers can be inserted with ease.

The exterior surface of the ring wall is may present a rather irregular contour. This is of small consequence because a substantial space between the inside of the shell II and the exterior of the ring wall III is normally provided to permit expansion of the stove with respect to the stove shell l3, and also to permit the insertion of insulating material, which is merely of filler character and which need have no bond with the ring wall. For this reason the bricks on the exterior of the ring wall ll" may presents. somewhat irregular surface and the cutting, it any, need not be exact.

The present invention has the advantage that a checker body may be built up having plane surfaces around its perimeter using only standard hexagonal checkers, half checkers, and

Though a-preferred embodiment of the presen invention has been described in detail, many modifications will occur to those skilled in the art. It is intended to cover all such modifications that fall within the scope of the appended claim.

What is claimed is: v

In combination, in an assembly of checkers, regular checkers each having a cross sectional contour in the form of a regular hexagon. supplementary checkers each comprising half of a regular checker divided along a plane extending through opposite vertices of said regular hexagon and other supplementary checkers each having a cross sectional contour in the form of a pentagon symmetrical about an axis, four sides of said pentagon lying in colinear relationship with the sidesofsaidregularhexagmtwocppositesides of said pentagon being parallel with said axis of symmetry and connected to the fifth side through pentagonal checkers includes a continuous outer wall braced by partitions between said holes, said regular checkers and said first mentioned supplementary checkers being arranged in alternate side by side relationship with one another forming a group, the non-hexagonal sides of said group of said first mentioned supplementary checkers being disposed in coplanar relationship with sides of said regular checkers forming an extended flat surface along the exterior-wall'oi said assembly, said second mentioned supple-- mentary checkers of another group being disposed with their said opposite sides in side by side relationship, with the fifth sides thereof disposed in coplanar relationship forming a second extended fiat surface of said assembly, an end checker of the first group and an end checker. of the other group being disposed in side by side relationship, forming" a corner construction with the extended fiat surfaces angularly disposed.

ERNEST H. KOENIG.

REFERENCES crrnn.

The foliowing'reference's are of record in the file of this patent:

UNITED STATES PATENTS Number Name .Date

1,075,128 Skinner Oct. 7, 1913 1,679,993 Strack v- Aug. '7, 1928 2,157,017 Rice May 2, use

FOREIGN PATENTS Number Country' Date 788,713 France July 3. 1034 

